I need an antivirus solution for one system on a LAN running a Windows 2000 Advanced Server OS. There are several other computers (not using server OS) connected on the same LAN but each has its own desktop AV solution. I do not need centralized management or protection of the other desktops. Just need standalone protection for the one file server. Can someone help me by suggesting exactly which version/edition of NOD32 I need and what kind of license do I have to buy?